title: Synthesis and receptor profiling of Stemona alkaloid analogues reveal a potent class of sigma ligands.
abstract: Reported biological activities of Stemona natural products, such as antitussive activity, inspired the development of synthetic methods to access several alkaloids within this family and in so doing develop a general route to the core skeleta shared by the class of natural products. The chemistry was subsequently adapted to afford a series of analogue sets bearing simplified, diverse Stemona-inspired skeleta. Over 100 of these analogues were subjected to general G protein-coupled receptor profiling along with the known antitussive compound, neostenine; this led to the identification of hit compounds targeting several receptor types. The particularly rich hit subset for sigma receptors was expanded with two focused library sets, which resulted in the discovery of a fully synthetic, potent chemotype of sigma ligands. This collaborative effort combined the development of synthetic methods with extensive, flexible screening resources and exemplifies the role of natural products in bioactivity mining.
authors.affiliation: Department of Medicinal Chemistry, University of Kansas, Delbert M Shankel Structural Biology Center, 2121 Simons Drive, Lawrence, KS 66047, USA.
authors.forename: Kevin J
authors.initials: KJ
authors.lastname: Frankowski
authors.forename: Vincent
authors.initials: V
authors.lastname: Setola
authors.forename: Jon M
authors.initials: JM
authors.lastname: Evans
authors.forename: Ben
authors.initials: B
authors.lastname: Neuenswander
authors.forename: Bryan L
authors.initials: BL
authors.lastname: Roth
authors.forename: Jeffrey
authors.initials: J
authors.lastname: Aubé
mesh_terms: D000470:Alkaloids / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology; D000818:Animals; D000996:Antitussive Agents / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology; D002460:Cell Line; D006801:Humans; D015394:Molecular Structure; D043562:Receptors, G-Protein-Coupled / Q000037:antagonists & inhibitors / Q000235:genetics / Q000378:metabolism; D041901:Stemonaceae / Q000737:chemistry*
chemical_list: D000470:Alkaloids; D000996:Antitussive Agents; D043562:Receptors, G-Protein-Coupled